Loading BP in metallic cases is simple. One basic rule, NO AIR SPACE. I suggest 1F because that will give you the least recoil. Fill the case to a little more than where the base of the bullet will sit. I made a powder compression die from an old die that simply did that, compressed the powder. Only needs to be a little. It was the only step done on a loading press. If you don't want to do that, then seat the bullet so that you feel a sight crunch when the powder is compressed. I used a 30 inch drop tube running from my Lyman powder measure to the case. The drop tube helps compact the powder evenly.
I shot a Shiloh Sharps in BPCR for years. If you are not hunting and need to carry cartridges in your pocket or bag, then there is no need to crimp or resize your cases. Set up your loads so that the bullet starts to engrave the rifling and closing the action compresses the powder a bit.
I always decapped the fired cases at the range and cleaned the primer pocket at the same time. I then tossed them into a small jug with a big mouth (like a fabric softener or laundry detergent jug) filled with water and Dawn dish detergent. Drop your fired empties into the jug. When you get home, shake the jug and then dump into a plastic tub or bucket. I made a small jag out of a piece of dowel that would go into the end of a cheap electric screwdriver. I put a patch on the jag and swab out the inside of the cases. I rinsed them in hot water and then put them in a net bag to dry. I actually used another step that you don't need to do, but it makes them dry faster. After rinsing in hot water, I rinsed them in denatured alcohol and then put them in the net bag to dry. I reused that alcohol forever.
Reloading is then a simple matter of priming and charging with powder compressing the powder (if you choose to do that) and/or setting a bullet on top of compressed powder or compressing the powder with the bullet in your press.
You'll need an ammo box that keeps the cartridges vertical with the bullets up. I made mine. Foam in the top to keep the bullets in place. If you are going to hunt with the rifle, then you'll need to crimp the bullets or have good neck tension and the special ammo box is not required.
Have fun. Can't wait to hear your first report about recoil. That ain't no .22.